picom/src/x.c

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C
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#include <X11/Xlib.h>
#include <xcb/xcb_renderutil.h>
#include "common.h"
#include "x.h"
/**
* Get a specific attribute of a window.
*
* Returns a blank structure if the returned type and format does not
* match the requested type and format.
*
* @param ps current session
* @param w window
* @param atom atom of attribute to fetch
* @param length length to read
* @param rtype atom of the requested type
* @param rformat requested format
* @return a <code>winprop_t</code> structure containing the attribute
* and number of items. A blank one on failure.
*/
winprop_t
wid_get_prop_adv(const session_t *ps, Window w, Atom atom, long offset,
long length, Atom rtype, int rformat) {
Atom type = None;
int format = 0;
unsigned long nitems = 0, after = 0;
unsigned char *data = NULL;
if (Success == XGetWindowProperty(ps->dpy, w, atom, offset, length,
False, rtype, &type, &format, &nitems, &after, &data)
&& nitems && (AnyPropertyType == type || type == rtype)
&& (!rformat || format == rformat)
&& (8 == format || 16 == format || 32 == format)) {
return (winprop_t) {
.data.p8 = data,
.nitems = nitems,
.type = type,
.format = format,
};
}
cxfree(data);
return (winprop_t) {
.data.p8 = NULL,
.nitems = 0,
.type = AnyPropertyType,
.format = 0
};
}
/**
* Get the value of a type-<code>Window</code> property of a window.
*
* @return the value if successful, 0 otherwise
*/
Window
wid_get_prop_window(session_t *ps, Window wid, Atom aprop) {
// Get the attribute
Window p = None;
winprop_t prop = wid_get_prop(ps, wid, aprop, 1L, XA_WINDOW, 32);
// Return it
if (prop.nitems) {
p = *prop.data.p32;
}
free_winprop(&prop);
return p;
}
/**
* Get the value of a text property of a window.
*/
bool wid_get_text_prop(session_t *ps, Window wid, Atom prop,
char ***pstrlst, int *pnstr) {
XTextProperty text_prop = { NULL, None, 0, 0 };
if (!(XGetTextProperty(ps->dpy, wid, &text_prop, prop) && text_prop.value))
return false;
if (Success !=
XmbTextPropertyToTextList(ps->dpy, &text_prop, pstrlst, pnstr)
|| !*pnstr) {
*pnstr = 0;
if (*pstrlst)
XFreeStringList(*pstrlst);
cxfree(text_prop.value);
return false;
}
cxfree(text_prop.value);
return true;
}
static inline void x_get_server_pictfmts(session_t *ps) {
xcb_connection_t *c = XGetXCBConnection(ps->dpy);
xcb_generic_error_t *e = NULL;
// Get window picture format
ps->pictfmts =
xcb_render_query_pict_formats_reply(c,
xcb_render_query_pict_formats(c), &e);
if (e || !ps->pictfmts) {
printf_errf("(): failed to get pict formats\n");
abort();
}
}
xcb_render_pictforminfo_t *x_get_pictform_for_visual(session_t *ps, xcb_visualid_t visual) {
if (!ps->pictfmts)
x_get_server_pictfmts(ps);
xcb_render_pictvisual_t *pv = xcb_render_util_find_visual_format(ps->pictfmts, visual);
for(xcb_render_pictforminfo_iterator_t i =
xcb_render_query_pict_formats_formats_iterator(ps->pictfmts); i.rem;
xcb_render_pictforminfo_next(&i)) {
if (i.data->id == pv->format)
return i.data;
}
return NULL;
}
xcb_render_picture_t
x_create_picture_with_pictfmt_and_pixmap(
session_t *ps, xcb_render_pictforminfo_t * pictfmt,
xcb_pixmap_t pixmap, unsigned long valuemask,
const xcb_render_create_picture_value_list_t *attr)
{
void *buf = NULL;
if (attr) {
xcb_render_create_picture_value_list_serialize(&buf, valuemask, attr);
if (!buf) {
printf_errf("(): failed to serialize picture attributes");
return None;
}
}
xcb_connection_t *c = XGetXCBConnection(ps->dpy);
xcb_render_picture_t tmp_picture = xcb_generate_id(c);
xcb_generic_error_t *e =
xcb_request_check(c, xcb_render_create_picture_checked(c, tmp_picture,
pixmap, pictfmt->id, valuemask, buf));
free(buf);
if (e) {
printf_errf("(): failed to create picture");
return None;
}
return tmp_picture;
}
xcb_render_picture_t
x_create_picture_with_visual_and_pixmap(
session_t *ps, xcb_visualid_t visual,
xcb_pixmap_t pixmap, unsigned long valuemask,
const xcb_render_create_picture_value_list_t *attr)
{
xcb_render_pictforminfo_t *pictfmt = x_get_pictform_for_visual(ps, visual);
return x_create_picture_with_pictfmt_and_pixmap(ps, pictfmt, pixmap, valuemask, attr);
}
xcb_render_picture_t
x_create_picture_with_standard_and_pixmap(
session_t *ps, xcb_pict_standard_t standard,
xcb_pixmap_t pixmap, unsigned long valuemask,
const xcb_render_create_picture_value_list_t *attr)
{
if (!ps->pictfmts)
x_get_server_pictfmts(ps);
xcb_render_pictforminfo_t *pictfmt =
xcb_render_util_find_standard_format(ps->pictfmts, standard);
assert(pictfmt);
return x_create_picture_with_pictfmt_and_pixmap(ps, pictfmt, pixmap, valuemask, attr);
}
/**
* Create an picture.
*/
xcb_render_picture_t
x_create_picture(session_t *ps, int wid, int hei,
xcb_render_pictforminfo_t *pictfmt, unsigned long valuemask,
const xcb_render_create_picture_value_list_t *attr)
{
if (!pictfmt)
pictfmt = x_get_pictform_for_visual(ps, ps->vis);
if (!pictfmt) {
printf_errf("(): default visual is invalid");
abort();
}
int depth = pictfmt->depth;
Pixmap tmp_pixmap = XCreatePixmap(ps->dpy, ps->root, wid, hei, depth);
if (!tmp_pixmap)
return None;
xcb_render_picture_t picture =
x_create_picture_with_pictfmt_and_pixmap(ps, pictfmt, tmp_pixmap, valuemask, attr);
free_pixmap(ps, &tmp_pixmap);
return picture;
}